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Q1. | Which one the following is an advantage of AM over FM? |

A. | FM has wide bandwidth [Wrong Answer] |

B. | FM has better [Wrong Answer] |

C. | FM is more immune to noise [Wrong Answer] |

D. | Probability of noise spike generation is less in AM [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ A thermistor is used for

over voltage protection

temperature alarm circuit

automatic light control

none of the above

⇒ When reverse bias is applied to a junction diode

minority carrier current is increased

majority carrier current is increased

potential barrier is lowered

potential barrier is raised

⇒ If the drift velocity of holes under a field gradient of 100 V/m is 5m/sec. Their mobility is

0.05

0.5

50

500

⇒ The number of logic or arithmetic operations with

`ALU 1C 74181`

can carry out is4

8

16

32

⇒ A proportional controller is basically

an amplifier with adjustable gain

an integrating amplifier

an amplifier with infinite gain

an amplifier with almost zero gain

⇒ An ac network has a power factor of 0.8 leading if the applied wave is of fundamental frequency. If the applied wave contains third and fifth harmonics, the overall power factor will be

0.8 leading

less than 0.8 leading

more than 0.8 leading

0.8 leading or more

⇒ 2's complement of (-24) =

11101000

1001000

1111111

111111

⇒ A discrete zero memory information source has 40 symbols and each symbol is equally likely. The minimum number of bits required to code the source with uniform length code and entropy of the source are

5 and 5.03

6 and 5.83

5 and 6.64

6 and 5.32

⇒ A transmission line discontinuity is defined as any interruption in the uniformity of the line.

TRUE

FALSE

⇒ Laplacian of a scalar function V is

gradient of V

gradient of the gradient of V

divergence of V

divergence of the gradient of V

⇒ The mechanical system shown below has its pole(s)

- K/D

- D/K

- DK

0, - K/D

⇒ Power factor of the following circuit will be unity

inductance

capacitance

resistance

both (a) and (b)

⇒ A chopper

converts constant voltage dc into ac and then into variable voltage dc

converts constant voltage dc into variable voltage dc directly

converts ac of one frequency into ac of another frequency

converts ac to dc

⇒ Diamond is a paramagnetic material.

TRUE

FALSE

⇒ In the generic microprocessor

instruction cycle time period is shorter than machine cycle time period

machine cycle time period is shorter than instruction cycle time period

instruction cycle time period is exactly half of machine cycle time period

instruction cycle time period is exactly equal to machine cycle time period

⇒ The radiation pattern of Hertzian dipole in the plane perpendicular to dipole is a

null

circle

figure of eight

none of the above

⇒ In feedback amplifier the closed loop gain is nearly independent of open loop gain and depends only on the feedback factor.

TRUE

FALSE

⇒ The current gain of a bipolar transistor drops at high frequencies because of

transistor capacitance

high current effects in the base

parasitic inductive elements

the early effect

⇒ The most commonly used bias in BJT amplifier circuits is

voltage divider bias

emitter bias

collector bias

collector feedback bias

⇒

**Assertion (A):** In a BCD to 7 segment decoder the number of outputs active at one time is always the same.

**Reason (R):** A decoder can be used to interface BCD input to LED display.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

⇒ The circuit of figur

clipper, sine wave clipped at - 2 V

clamper

clamper, sine wave clamped at zero V

clipper, sine wave clipped at + 2 V

⇒ In filter system of sideband suppression the advantage of using mechanical filter is

smaller size

good bandpass

good attenuation characteristics

all of the above

⇒ Fourier transform o the function

*f*(

*t*) = 1 is

2p δ (ω)

p δ (ω)

δ(ω)/2p

δ(ω)/p

⇒ With regard to a transmission line, which of the following statements is correct?

Any impedance repeats itself every 1/4 on the Smith chart.

The S.W.R. = 2 circle and the magnitude of reflection coefficient = 0.5 circle coincide on the Smith chart.

At any point on a transmission line, the current reflection coefficient is the reciprocal of the voltage reflection coefficient.

Matching eliminates the reflected wave between the source and the matching device location.

⇒ A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance

increases

decreases

remains constant

may increases or decreases

⇒ The phase difference (

*j*ω -

*p*

_{1}) means

phasor drawn from

*p*

_{1}to

*j*ω

phasor drawn from origin to

*p*

_{1}

phasor directed from origin to

*j*ω point

phasor directed from

*j*ω to

*p*

_{1}

⇒ 2's complement representation of a 16 bit number (one sign bit and 15 magnitude bits) is FFFF. Its magnitude in decimal representation is

0

1

32, 767

65, 535

⇒ If

*x*

*= 2*

_{k}*for*

^{k}*k*≤ 0 and = 0 for

*k*> 0 X(

*z*) = 2/(2 -

*z*).

TRUE

FALSE

⇒ Find the number of loop equation and number of possible trees for the given gr

7, 2097152

7, 262144

7.5764801

6, 823543

⇒ VLF waves are used for communication system because

of low power requirement

they are least prone to distortion

they penetrate the ionosphere easily

the transmitting antennas are of convenient size